diff --git a/lib/phoenix/socket/transport.ex b/lib/phoenix/socket/transport.ex
index 7fd1f2f6fd..a09c778b89 100644
--- a/lib/phoenix/socket/transport.ex
+++ b/lib/phoenix/socket/transport.ex
@@ -269,7 +269,7 @@ defmodule Phoenix.Socket.Transport do
 
     connect_info =
       Enum.map(connect_info, fn
-        key when key in [:peer_data, :trace_context_headers, :uri, :user_agent, :x_headers, :sec_websocket_protocol, :auth_token] ->
+        key when key in [:peer_data, :trace_context_headers, :uri, :user_agent, :x_headers, :sec_websocket_headers, :auth_token] ->
           key
 
         {:session, session} ->